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Resistive crossbar arrays can carry out energy-efficient vector&#x2013;matrix multiplication, which is a crucial operation in most machine learning applications. However, practical computing tasks that require high precision remain challenging to implement in such arrays because of intrinsic device variability. Herein, we experimentally demonstrate a precision-extension technique whereby high precision can be attained through the combined operation of multiple devices, each of which stores a portion of the required bit width. Additionally, designed analog-to-digital converters are used to remove the unpredictable effects from noise sources. An <inline-formula> <tex-math notation="LaTeX">$8\times 15$ </tex-math></inline-formula> carbon nanotube transistor array can perform multiplication operation, where operands have up to 16 valid bits, without any error, making in-memory computing approaches attractive for high-throughput energy-efficient machine learning accelerators.

16-Bit Fixed-Point Number Multiplication With CNT Transistor Dot-Product Engine